Question

Brass is a mixture of:
(This question has multiple correct options)
A. Copper
B. Zinc
C. Tin
D. Lead

Answer 1

Hint : Brass is an alloy of two metals one of its metals is slightly brittle at room temperature and has a blue-silver appearance when it is reduced. And one of its metals is soft, malleable and ductile with very high thermal and electrical conductivity. It has a pinkish-orange color.

Complete Step By Step Answer:
Brass is an alloy made up of copper and zinc. It is a substitutional alloy which means atoms of two constituents can replace each other within the crystal structure. Brass has higher malleability than bronze. The presence of moisture will corrode the brass. Brass also gets corroded when comes in contact with chloride, acetates, ammonia and certain acids.
So, option A and B are correct.

Additional Information:
Biological role of copper:
Copper proteins have a major role in biological electron transport and oxygen transportation, it exploits the easy interconversion of copper ions. Copper is very important in the aerobic respiration of all eukaryotes. In mitochondria, it is found in cytochrome oxidase, it is the last protein in oxidative phosphorylation.
Applications of copper:
-It is used in wire and cables.
-Electronics
-Electric motors
-Architecture
-Antimicrobial
-Speculative investing and folk medicine
Biological role of zinc:
Zinc also has a major role in biological work. It is a very efficient lewis acid which makes it a useful catalytic agent in the process of hydroxylation and some other enzymatic reactions. It helps to break peptide linkages during digestion of proteins.
Applications of zinc:
-It is used in anti-corrosion batteries.
-Alloys
-Organic chemistry
-Dietary supplements.

Note :
Brass is easily machined and requires a good deal of maintenance. It is prone to a blackish tarnish. The biggest challenge to upkeep most metals, including brass, is the removal and inhibition of tarnish. All substances, especially metals, oxidize when exposed to the air.